• Electrostatic spray painting technology foreword

With the continuous development of the level of industrial technology and people’s spiritual civilization level of continuous improvement at the same time, people’s requirements for products in the appearance of higher and higher, both elegant and elegant and affordable trust, electrostatic spray painting technology is a new technology developed in recent years in the international agile, is widely used in various industrial industries surface treatment. It can not only save paint, compared to traditional spray paint. And can improve the level of environmental clean-up, and can make the spraying process mechanized, continuous, reduce the rate of bad spraying, to obtain an excellent coating effect. Electrostatic spraying technology greatly improves labor productivity and labor conditions, thus obtaining considerable socio-economic benefits. From the point of view of user experience, can better meet the various industries enterprises.

  • The basic principle of electrostatic spray painting

Electrostatic spray painting is to be painted as the positive electrode, grounded in the daily scenario; paint atomization device for the negative electrode, connected to the power supply negative high voltage, so that in the two poles made a high-voltage electrostatic field. As a result of the corona discharge at the cathode, the sprayed paint medium can be charged and further atomized. In accordance with the principle of “same-sex repulsion, opposites attract”, the charged paint medium is subject to the electric field force (F = twist), the paint to be painted to form a ring effect, along the power line directional flow to the appearance of positively charged painted objects, pile up into a layer of average, firmly attached film. Electrostatic painting technology can also be used positive corona discharge, but the critical voltage of negative corona discharge is lower than positive corona discharge, and more stable, less likely to generate sparks. The usual scenario will be painted as positive ground.

  • Electrostatic spraying equipment

Electrostatic spraying equipment – electrostatic spray gun (including a spray gun, atomizing nozzle, an electrostatic generator, as well as a paint pump), electrostatic spray guns on the market are more commonly used brands such as Seahorse, Yuanqi, Hongda, Iwata, Graco, Taiwan Seahorse, Yuanqi, Hongda because of the cost advantages (including after-sales maintenance costs), and technical parameters have reached a level that can meet the needs of a variety of products. And the technical parameters have been reached to meet the spraying requirements of various products and coatings. Paint spray gun atomization nozzle can be selected according to the different coatings, painted objects, such as TCN20 metal round nozzle, suitable for spraying transparent paint, fan-shaped nozzle for spraying large flat products, with magnetic round nozzle for spraying color paint, etc., nozzle selection is best to consult professional technicians, about the general high voltage generator power is generally between 30KV-80KV, and the general supply Paint pump spraying pressure is generally in the 0.4MPA or so. In addition, electrostatic spraying equipment according to the different functions of manual electrostatic spraying and automatic electrostatic spraying, the principle is the same, electrostatic spraying is mainly installed in automated production lines, such as robots, reciprocating machines, but the flexibility is not as high as manual electrostatic spraying, many products must use manual electrostatic spraying to achieve the spraying requirements.

  • The development of electrostatic spray painting history

In 1876 France found that the role of static electricity to make the liquid particulate, in 1903 the United States published a patent using electrostatic atomization, in 1944 France laid the foundation of the cup electrostatic spraying. In 1956 the United States was patented an electrostatic coating device, then the United States, France, Britain, Switzerland, Japan, many companies have appeared in a variety of electrostatic coating equipment. 50s China’s introduction of spin cup electrostatic spraying equipment, the 70s In the 1950s, China introduced the rotary cup electrostatic spraying equipment, and in the 1970s, the Omega type (i.e. garden disk type) electrostatic spraying equipment was introduced.